Thermostat



FIG. 1 is a bottom, front, right side perspective view of a thermostatshowing my new design;

FIG. 2 is a top, rear, left side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is an enlarged left side elevation view thereof;

FIG. 6 is an enlarged right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

CLAIM The ornamental design for a thermostat, as shown and described.